<template>
  <div :class="{'show':show}" class="header-search">
    <svg-icon class-name="search-icon" icon-class="search" @click="click"/>
    <el-select
      ref="headerSearchSelect"
      v-model="search"
      filterable
      default-first-option
      remote
      placeholder="Search"
      class="header-search-select"
    >
      <el-option
        v-for="item in options"
        :key="item.path"
        :value="item"
        :label="item.title.join(' > ')"
      />
    </el-select>
  </div>
</template>

<script>
import Fuse from 'fuse.js'
// import path from 'path'
// import i18n from '@/lang'

export default {
  name: 'HeaderSearch',
  data() {
    return {
      search: '',
      options: [],
      searchPool: [],
      show: false,
      fuse: undefined
    }
  },
  //   computed: {
  //     routers() {
  //       return this.$store.getters.permission_routers
  //     },
  //     lang() {
  //       return this.$store.getters.language
  //     }
  //   },
  watch: {
    //     lang() {
    //       this.searchPool = this.generateRouters(this.routers)
    //     },
    //     routers() {
    //       this.searchPool = this.generateRouters(this.routers)
    //     },
    searchPool(list) {
      this.initFuse(list)
    },
    show(value) {
      if (value) {
        document.body.addEventListener('click', this.close)
      } else {
        document.body.removeEventListener('click', this.close)
      }
    }
  },
  //   mounted() {
  //     this.searchPool = this.generateRouters(this.routers)
  // },
  methods: {
    click() {
      this.show = !this.show
      if (this.show) {
        this.$refs.headerSearchSelect && this.$refs.headerSearchSelect.focus()
      }
    },
    close() {
      this.$refs.headerSearchSelect && this.$refs.headerSearchSelect.blur()
      this.options = []
      this.show = false
    },
    // change(val) {
    //   this.$router.push(val.path)
    //   this.search = ''
    //   this.options = []
    //   this.$nextTick(() => {
    //     this.show = false
    //   })
    // },
    initFuse(list) {
      this.fuse = new Fuse(list, {
        shouldSort: true,
        threshold: 0.4,
        location: 0,
        distance: 100,
        maxPatternLength: 32,
        minMatchCharLength: 1,
        keys: [{
          name: 'title',
          weight: 0.7
        }, {
          name: 'path',
          weight: 0.3
        }]
      })
    }
    //     // Filter out the routes that can be displayed in the sidebar
    //     // And generate the internationalized title
    //     generateRouters(routers, basePath = '/', prefixTitle = []) {
    //       let res = []

    //       for (const router of routers) {
    //         // skip hidden router
    //         if (router.hidden) { continue }

    //         const data = {
    //           path: path.resolve(basePath, router.path),
    //           title: [...prefixTitle]
    //         }

    //         if (router.meta && router.meta.title) {
    //           // generate internationalized title
    //           const i18ntitle = i18n.t(`route.${router.meta.title}`)

    //           data.title = [...data.title, i18ntitle]

    //           if (router.redirect !== 'noredirect') {
    //             // only push the routes with title
    //             // special case: need to exclude parent router without redirect
    //             res.push(data)
    //           }
    //         }

    //         // recursive child routers
    //         if (router.children) {
    //           const tempRouters = this.generateRouters(router.children, data.path, data.title)
    //           if (tempRouters.length >= 1) {
    //             res = [...res, ...tempRouters]
    //           }
    //         }
    //       }
    //       return res
    //     },
    // querySearch(query) {
    //   if (query !== '') {
    //     this.options = this.fuse.search(query)
    //   } else {
    //     this.options = []
    //   }
    // }
  }
}
</script>

<style lang="scss" scoped>
.header-search {
  font-size: 0 !important;

  .search-icon {
    cursor: pointer;
    font-size: 18px;
    vertical-align: middle;
  }

  .header-search-select {
    font-size: 18px;
    transition: width 0.2s;
    width: 0;
    overflow: hidden;
    background: transparent;
    border-radius: 0;
    display: inline-block;
    vertical-align: middle;

    /deep/ .el-input__inner {
      border-radius: 0;
      border: 0;
      padding-left: 0;
      padding-right: 0;
      box-shadow: none !important;
      border-bottom: 1px solid #d9d9d9;
      vertical-align: middle;
    }
  }

  &.show {
    .header-search-select {
      width: 210px;
      margin-left: 10px;
    }
  }
}
</style>
